Semiconductor device

According to one embodiment, a semiconductor device includes first and second metal members, and a semiconductor element. The first metal member is electrically connected to a first terminal. The semiconductor element includes first and second electrodes, first to third semiconductor regions, and a gate electrode. The second metal member is provided on the second electrode, and electrically connected to the second electrode and a second terminal. The semiconductor element includes a first portion that overlaps the second metal member in the first direction, and a second portion that does not overlap the second metal member in the first direction. A length in the second direction of the first semiconductor region between an adjacent pair of the gate electrodes is greater than a length in the second direction of the first semiconductor region between an adjacent pair of the gate electrodes.